Query : 2007A&A...463L...5H

2007A&A...463L...5H - Astronomy and Astrophysics, volume 463, L5-8 (2007/2-4)

XMM-Newton observations of PSR B1957+20.


Abstract (from CDS):

We report on XMM-Newton observations of the ``Black Widow pulsar'', PSR B1957+20. The pulsar's X-ray emission is non-thermal and best modeled with a single powerlaw spectrum of photon index 2.03+0.51–0.36. No coherent X-ray pulsations at the pulsar's spin-period could be detected, though a strong binary-phase dependence of the X-ray flux is observed for the first time. The data suggest that the majority of the pulsar's X-radiation is emitted from a small part of the binary orbit only. We identified this part as being near to where the radio eclipse takes place. This could mean that the X-rays from PSR B1957+20 are mostly due to intra-shock emission which is strongest when the pulsar wind interacts with the ablated material from the companion star.

Abstract Copyright:

Journal keyword(s): pulsars: individual: PSR B1957+20 - stars: neutron - X-rays: stars - binaries: eclipsing

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 790 3
2 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 289 1

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